Convertible pump mount and lubrication arrangement



April 2, 1957 s. E. BOCK ErAL 2,787,065

CONVERTIBLE PUMP MOUNT AND ,LUBRICATION ARRANGEMENT Filed Nov. 30, 19534 Sheets-Sheet 1 G. E. BOCK ET AL April 2, 1957 CONVERTIBLE PUMP MOUNTAND LUBRICATION ARRANGEMENT File d NOV. 30, 1955 4 Sheets-Sheet 2 JFZUemZOra.

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Nam QM M 4 Sheets-Sheet 5 mwh G. E. BOCK ETAL CONVERTIBLE PUMP MOUNT-ANDLUBRICATION ARRANGEMENT April 2, 1957 Filed Nov. 30, 1953 safari? (f; 917 rew Apfil 2, 1957 G. E. BocK ETAL 4 Sheets-Sheet 4 CONVERTIBLE PUMPMOUNT AND LUBRICATION ARRANGEMENT Filed NOV. 3Q, 1953 Jizvergfors.

590g K600i 6f M \jmesJi gjf United States Patent CONVERTIBLE PUMP MOUNTAND LUBRICATION ARRANGEMENT George ErBock, Munster, and James H. Graas,Griffith, Ind., assignors to Pullman-Standard Car Manufacturing Company,Chicago, Ill., acorporation of Delaware Application November 30, 1953,Serial No. 395,123 11 Claims. (Cl. 37-144) The present invention relatesto a convertible mounting; for a pump and lubrication arrangement, andmore particularly to such a mounting arrangement in a lift frame of abulldozer or the like adapted. for use with either hydraulic orwinch-operated means for actuating the bulldozer moldboard".

'In the illustrated embodiment of the invention, a lift frame having itsforward portion formed; of hollow base, side, and top frame parts incommunication with each other to provide an oil reservoir at the lowerportion thereof and an air cushion at the upper portion is adapted forsecurement ona tractor or. other vehicle carryinga blade or mcldboardswingable in a vertical plane. Hydraulic means such as cylinders may beutilized to lift the moldboard, a pump being provided to supply oil fromthe reservoir to such means under pressure for operation thereof.Winch-operated lifting means may be employed instead of the hydraulicmeans to operate the moldboard' by means of a cable windable on thewinch, and a driving pinion and a gear of the winch meshing therewith,by which thewinch is driven, serve also as gear pumpmeans to circulateoil to thebearings from the reservoir. Either the hydraulic or thewinchaoperable lifting means may be mounted on the same frame, sothat-only one type or construction of lift frame is required regardlessof the type of lifting means to boomployed. The reservoir is providedwith a hollow mounting pad having outlet and return means forcommunication with correspondingly disposed intake and, exhaust passagesor ports of the pump means mounted thereon as by belts or the like, themounting pad having a bolting pattern to which correspond the boltingpatterns of the different pump means, so that proper location of theparts is assured; Within the oil reservoir there is provided a closedchamber from which conduits extend to the side frame members, and towhich the return means provides communication, so that heated oilreturned to the tank from the lifting means by the particular pump meansis led to the side frame members to rise by convection and flowdownwardly as itcools, and is kept from mixing with already cooled oil.This also allows for settling or deposition of dirt and other impuritiesfrom the oil on the bottom of the reservoir. let means communicatesprimarily with the portion of the reservoir outside of the chamber,sotha-t the cooler oil is drawn out by the pump means, but to a minorextent communicates. also withthe closed. chamber, so that if for anyreason a sufiicient volume of oil toprevent vacuum gaps in the flow isnot drawnfrom the remainder of the reservoir, oil-will be drawn directlyfrom the chamber to supply the deficiency.

One great advantage of thepresent invention is the ample. lubricationfor the winch parts resulting from the utilization of the oil reservoirin conjunction with winch-operable moldboard lifting means, priorconstructions being deficient in this respect. Another is the reductionof time, labor, and cost effected in manufacturing by the employment ofonly one type of lift frame for bulldozers with either hydraulic orwinch-operable lifting means. Further,- the invention provides for thecooling of the oil and the removal of impurities therefrom, and thesupply of cool, clean oil to the lifting means for most efilcient.operation thereof, whether of the hydraulic or winch type. Avoidance ofthe development of vacuum in the operation of the pump means is assuredby the construction. Proper location of either pump means relative tothe reservoir is provided for.

It is an object of the present invention to provide a lift frame forbulldozers or the like equally applicable for. use with hydraulic orwinch-operable lifting means for the bulldozer moldboard.

Another object is the provision of a lift frame for bulldozers or thelike incorporating an oil reservoir and on which hydraulic andwinch-operable means for lifting the bulldozer moldboard arealternatively mountable.

Another object is the provision of a lift frame for bulldozers or thelike incorporating an oil reservoir and adapted for mounting eitherhydraulic means for lifting, the bulldozer moldboard operable by oilfrom the i reservoir or winch. means for lifting the moldboard lubri-The outcated by the reservoir oil.

Another object is the provision of a lift frame for bulldozers or thelike incorporating an. oil reservoir and equally adapted formountinghydraulic or winch-operable moldboard lifting means by utilization ofthe reservoir to supply oil for operation of" hydraulic means or oil forlubricationof winch means.

It is another object. of the invention to provide a lift frame forbulldozers or the like incorporating a reservoir for oil to operatehydraulic lifting means for a bulldozer moldboard or to lubricatewinch-operablemoldboard lifting means, in which circulation of oil iscon- -trolled to: assure the supply of cool oil to the lifting means,avoid vacuum locks, and allow settling of impurities from the oil.

Another object is the provision of means to assure ample lubrication ofwinch-operable moldboard lifting means in a bulldozer or the like forefficient operation thereof. a

A further. object is the provision of a. hollow frame support for eitherhydraulic means or winch means affo-rding reservoir of oil for operationof the hydraulic means or lubrication of the winch means.

Other and. further objects, advantages, and features of the inventionwill be apparent to those skilled in the art from the followingdescription, taken in conjunction with the accompanying drawings, inwhich:

Fig. 1 is a front elevati-onal view of the lift frame of this invention,showing hydraulic moldboard lifting means. mounted thereon and alsoshowing portions of winch-operable lifting means. thereon;

Fig. 2 is a side elevational view of the construction shown in Fig. 1;

Fig. 3. is a fragmentary horizontal sectional view through the upperportion of the lift frame, taken substantially as indicated by the line3-3 of Fig. 1;

Fig. 4 is a horizontal sectional viewthrough the lower portion of thelift frame, somewhat enlarged, taken substantially as indicated by theline 4 -4-of Fig. 1;

Fig. 5 is a vertical sectional view through the lower f atented Apr. 2,1957 portion of the lift frame and the pump mounted thereon, glkensubstantially as indicated by the line 55 of Fig. 6 is a verticalsectional view through the lower portion of the lift frame and the pumpmounted thereon, taken substantially as indicated by the line 6--6 ofFig. 4;

Fig. 7 is an enlarged fragmentary sectional view taken substantially asindicated by the line 7--7 of Fig. 8, similar to Fig. 5, but showing thepump means of winchoperable lifting means; and

Fig. 8 is a sectional view taken substantially as indicated by the line8-8 of Fig. 7.

Referring firstto Figs. 1 and 2 of the drawings, there is shown a liftframe generally designated 10 for securement on a tractor or othervehicle carrying a moldboard (not shown) to mount lifting means for themoldboard. The frame 10 comprises a pair of vertical side plates 11extending rearwardly from a front frame portion which is of hollowconstruction, the forward ends 12 of the side plates being bent inwardlytoward each other, as best shown in Figs. 3 and 4, to form parts of thefront frame portion. The front frame portion comprises a hollow basedefined by top and bottom plates 13 and 14, a front wall 15, a rear wall16, and end walls 17, suitably welded or otherwise secured together inoil-tight relation, the forward end portions 12 of the side plates 11engaging on and-being secured to the ends of the top plate 13. Hollowside frame members 18 extending vertically from the base are defined bythe forward portions 12 and the adjacent portions of the side plates andby vertically extending angularly bent plates 19 the edges of which arewelded to the rearwardly extending side plate portions and the inwardlyextending side plate portions 12 to define generally rectangular hollowcolumns. An aperture 20 isprovided adjacent each end of the base topplate 13 for communication between the side frame members and the base.A hollow top frame member connects the upper ends of the side framemembers 18, being defined by an angle plate 21 extending between the topedges of the side plates 11 to form the bottom and rear wall of the topmember. The front is formed by a plate 22 flush with the side plateforward portions 12 flanged at its top and ends as at 24 to form part ofthe top and ends of the top member, the ends extending flush with theside plates 11. A cover plate 23 of inverted U sh ape flush with theflanged portions of the front plate provides the remainder of the topand ends of the top member and extends rearwardly beyond the rear walldefined by the angle plate 21 to connect the upper ends of the sideplates. Apertures 25 are formed in the bottom of the top member toprovide communication with the side frame members 18.

The front end of the lift frame 10 is thus formed of hollow members insubstantially rectangular relation and in communication with each other,defining a central opening through which cooling air may pass to theradiator of a tractor motor disposed rearwardly thereof. The margins ofthe side plate portions 12 and of the front plate 22 projectrespectively inwardly of the plates 19 and plate 21 and at intervalshave threaded apertures backed by tapping blocks 27 to receive bolts orthe like for the securement of a foraminous guard plate G which ispreferably disposed across the opening. The front: end of the frame maybe bowed forwardly as shown, the base front wall 15, side plate portions12, front plate 22, and guard plate'G being appropriately curved. Thelower portion of the hollow frame serves as a reservoir or tank for oil,which may be introduced through a filler pipe 28 having a strainer,disposed in one of the hollow side frame members and opening into arecess 29 formed 1n the frame member to allow access to the pipe and itsclosure cap from outside of the frame. The filling recess 29 is definedby suitable plates of such size and arrangement as'to leave the upperand lower portions of the hollow frame member in communication. with, 1Other- On the top wall 13 of the frame base and centrally thereof, amounting pad 30 is formed by a rear plate 31 substantially in the planeof the rear wall 16 of the base and a parallel forward plate 32 disposedbetween the front and rear edges of the top wall, with a pair ofvertical side plates 33 extending substantially across the top wall atthe ends of the front and rear plates and having inturned flanges 34 attheir forward ends lying substantially in the plane of the front wall 15of the base and backed by tapping blocks 27 to secure the guard plate G.A flat horizontal top or mounting plate 35 is secured to the upper edgesof the plates 31, 32, and 33. An aperture 36 in the top wall 13substantially corresponding to the dimensions of the mounting pad 30leaves the hollow pad and base open to each other. Suitable partitionmeans, in this instance a pair of bent plates 37, extend from themounting plate 35 to the bottom wall"14 to enclose a space therebetween,defining a chamber 38 from the remainder of the reservoir. The partitionneed not have a tight fit or seal with the mounting plate and bottomwall, and may merely engage thereagainst, being tack-welded to thebottom wall so as to be held in place. Pipes 39 or similar means extendfrom the closed chamber 38 to the apertures 20 to afford communicationbetween the chamber and the hollow side frame members 18, havingorifices directed upwardly through the apertures and shown as providedby elbows on the pipe ends welded to the edges of the apertures. Theapertures 20 are of a size considerably greater than the pipe ends. Anoutlet aperture 40 is provided in the mounting plate 35 for withdrawalof oil from the tank or reservoir, and is so located as to be crossed byone of the partition plates 37, or

I in other words so that a portion of its area lies within the planprojection of the chamber 38. The major portion of the aperture 40,however, lies outside the projection of the chamber, so that theaperture is primarily in communication with the portion of the reservoiroutside of the chamber 38, and only to a minor extent with the chamberitself. An aperture 41 is also formed in the mounting plate for returnof withdrawn oil to the reservoir, this return aperture being locatedwholly within the plan projection of the chamber 38 so as to affordcommunication with the chamber only and not with the remainder of thereservoir. A plurality of tubular stools 42 extend vertically from theupper face of the mounting plate 35 through and below the bottom wall14, to both of which they are welded in oil-tight relation, providingmeans for locating parts to be mounted on the mounting pad and receivingtherethrough bolts or the like by which such parts are secured. A drainopening is provided in the bottom wall 14, normally closed by a suitableplug 43. To guard the drain plug and the lower ends of bolts extendingthrough the stools 42 below the bottom wall against damage, a protectingplate 44 is welded to the lower face of the bottom wall 14 directlybelow the mounting pad 30. The plate 44 is formed with apertures toaccommodate the drain plug and the projecting ends of the stools, and isof such thickness that the plug and ends of bolts in the stools are ineffect disposed in protecting recesses.

In Figs. 1 to 6 inclusive, hydraulic lifting means for raising andlowering the bulldozer moldboard are shown as mounted on the lift frame10. The hydraulic means comprise a pair of double-acting cylinders 45 atopposite sides of the lift frame, the piston rods of-which extenddownwardly and forwardly for connection in any suitable manner to themoldboard (not shown). A cross tube 46 is supported at the rear portionof the lift by pins 52 normal to the yoke: swivel axis. Eachcyh inder isthus allowed at least a certain amountof swinging movement in anydirection. Oil under pressureis supplied to the cylinders 45 throughflexible conduits 53 by a pump 55 of any suitable type from the. oilreser voir provided by the lift frame. The pump has a mounting base witha bolting pattern corresponding. to the locations of the stools 42, andis, secured on..the;mounting pad 30 by bolts 56 or the like extendingthrough the stools. The pump shaft 57 projects rearwardly through thepump casing for splinedlor other suitable connection with a powertakeoff shaft P of the tractor motor to provide for operation ofthepiunp. The pump 55 has an intake passage 58 openingthrough its basein suchlocation that it communicates through the aperture 40 with theinterior of the frame base when the pump is secured on the mounting pad,so that oil may be drawn from the tank or reservoir and delivered underpressure to the cylinders 45 as required by the pump, Any suitable valvemeans,,not shown, are interposed between the pump and; the cylinders tocontrol the delivery and return of oil to and from the cylinders, and areturn passage 59 leads from such valve. means through the base of thepump, opening at a point such, that it overlies the return aperture 41of themounting pad when the pump is secured in place, so that it is incommuni-. cation with the chamber 38 and oil returning from the valvemeans flows into the chamber.

Instead of hydraulic mo'ldboard-operating means such as just described,winch-operable cable means may be mounted on the lift frame for liftingthe moldboard of the bulldozer. The braces, cross tube, yoke structureswith the cylinders carried thereby, conduits, valve means, and pump arethen omitted. A, pair of pulley block bracket plates 60 are welded onthe upper forward portion of the lift frame, reinforced by a brace plate61 welded therebetween, and a side sheave bracket. 62 is weldedlysecured on the upper frontportion of the frame at one side thereof, asshown; in Figs. 1 and 2. Although these parts are illustrated as securedon the lift frame along with the hydraulic lifting means, forconvenience, it will be understood that they are omitted when thehydraulic means are employed. The bracket plates 60 support a pulleyblock, and the bracket 62 a pulley, through which is reeved a cable foroperating the moldboard, windable on a winch 63 mounted on the frame andprojecting forwardly thereof through the guard plate G. To avoidconfusion, cable and pulleys are not shown, and the winch is shown onlyin Figs. 7 and 8, but such means and their arrangement are well known sothat specific illustration is not required. The winch is disposed withits rotational axis extendinglongitudinally of the tractor or bulldozer,and the cable extends from the winch about the side sheave inthc bracket62 through the block supported by the bracket plates 60 and a similarblock connected tothe moldboard, so that as the cable is wound on thewinch the moldboard is raised. Lowering is accomplishedby gravity uponallowing the cable to unwind from thewinch- This is in contrast to theoperation of the hydraulic lifting means, in which the cylinders 45 bothraise and lower the moldboard. The winch 63' comprises a casing 64 ofgenerally cylindrical form. with. an integral mounting flange 65 at itslower portion provided with bolt holes. in the same pattern as thestools 42. of the mounting pad 30 and the bolt holes of the base ofpumpS5. The winch 63 is located and mounted on the mounting pad 3% in thesame manner as the pumpi55'of the hydraulic lifting means, being securedby the bolts 56. The winch is driven by means of a main gear 66. in meshwith a driving pinion 67 within the casing, the shaft 63 of the pinionprojecting rearwardly from the casing for connection with the powertake-off shaft P' of the tractor motor as in the case of the pump shaft57. Extending from the interior of. the casing 64at 'one side.

' designed and intended for driving the winch, also serveas a gear pumpefficient enough to circulateoilthrough the casing for lubricating thebearings of the Winch structure, as: for example the. bearings 7110f thepinion. 67; The oil-is. drawnfrom the reservoir provided. by the liftframe 10.through aperture 4i) and, the passage 69 by the pinion and maingear acting as pump means, and aftercirculation through the casing flowsback to the reservoir. through the return passage '70 and returnaperture 41".

Thus the lift frame of this invention may beemployed in a bulldozer orthe like, withoutchange, to mount either hydraulic or Winch-operablemoldboard lifting means. Simplification of assembly, reduction of thenumber of parts, and savingsin manufacturing are some of the advantagesafforded by this construction. Much more eflicient and trouble-freeoperation of winchoperated lifting means also results from the provisionof anoi-l tank outside of the winch, increasing the volume of oilavailable for lubrication thereof and allowing oil circulation toprevent undue heating. Heretofore, the winches on bulldozers havebeenlubricated only by oil contained within the casing, and since thereare definite limits on the size of the winches and a compactconstruction is necessary, only a limited volume of. oil could beemployed. This resulted in inadequate lubrication and undesirableheating of the oil and winch parts, with consequent inefficientoperation. By the present invention, ample lubrication and cooling ofthe parts and the oil is provided.

The closed chamber 38 within the hollow frame base substantiallyisolates the oil returned. through the aperture 41 from the liftingmeans, which has been heated, by contact with the moving winch parts orby its operation of thehydraulic cylinders. The warmed return oil. isconducted fromthe chamber 38 by the pipes 39 to the apertures 20 to riseby convection in the hollow side frame members 18. The oil of course iscooled by radia-.

tion and conduction, and as-it cools it moves downwardly. to the hollowbase through the apertures 20, and in its cooled condition is drawn outof the tank or reservoir through the outlet aperture 4% by the pumpmeans of the hydraulic or winch-operable lifting means for operation-or.lubrication thereof, as the case may be, in the manner described, sothat relatively cool oil is supplied to the liftingmeans by the pumpmeans. The circulation of the oil in the tank or reservoir is relativelyslow and gentle, affording opportunity for dirt and other foreignparticles that may be entrained therein to settle to the bottom wall .14of the base, leaving the oil in substantially clean condition fordelivery to the lifting means. The arrangement of the outlet; aperture4t in communication mainly with the portion of the tank outside of thechamber 33, but also in minor degree with the interior of thechamber,assures that the intake passage 58 of the pump 55 or the intake passage69 of the. winch 63 will be substantially filled by oil during operationof the respective pump means, so that no vacuum spaces or looks willdevelop to interfere with, proper flow or delivery of oil through thepump means. This results from the fact that if for any reason underabnormal conditions, insufficient oil is drawn from the remainder of thetank, oil just returned to the tank will be drawn from the chamber 38 tomake up the deficiency and assure the flow of the required volume of oilto and through the pump means. Oil

drawn through the outlet aperture 40, at least partly because of theelevated location of the mounting pad 30, causes no appreciabledisturbance of the sediment deposited on the bottom wall 14, so thatdirt or other impurities are not drawn through the pump means with theoil. The level of the oil in the tank or reservoir provided by the lowerportion of the hollow frame is substantially above the level of themounting plate 35 of the mounting pad, the volume of oil beingsubstantially constant in the case of the winch-operable lifting'means.The total volume of oil is also substantially constant when thehydraulic lifting means are employed, but the quantity of this oil inthe reservoir necessarily varies as more or less oil is passed into thecylinders 45 for desired operation thereof. Sulficient oil is provided,however, to assure maintenance of the oil level in the reselvoir abovethe level of the mounting pad at all times. The air in the upper portionof the hollow front portion of the frame serves to cushion hydrauliclifting means against shocks due to sudden changes in the flow of oil orsurges resulting therefrom.

What is claimed is:

1. A bulldozer lift frame adapted to mount either hydraulically operableor winch-operable lifting means for the moldboard of the bulldozer eachincluding pump means, comprising a hollow frame base, spaced hollowframe members extending upwardly from said base, apertures in said baseproviding communication with each of the frame members, a hollow topmember connecting and providing communication between the upper ends ofsaid frame members, a hollow mounting pad fixed on said base andcommunicating with the interior thereof and including a mounting plate,said base, mounting pad, and the lower portions of the frame membersproviding a reservoir for oil and said top member and the upper portionsof the frame members providing a cushioning air compartment, partitionmeans extending from the mounting plate to the opposed wall of said baseto define therewith a chamber closed from the remainder of saidreservoir, conduits leading from the chamber to each of the aperturesbetween the base and frame members, an outlet aperture in the mountingplate located with a minor portion of its area within the planprojection of the chamber for communication with both the chamber andthe remainder of the reservoir, a returnaperture in the mounting platelocated entirely within the plan projection of said chamber forcommunication therewith, and means carried by said frame base for 10-cating on the mounting plate in operative communication with said outletand return apertures the pump means of lifting means mounted on the liftframe.

2. A bulldozer lift frame construction adapted for assembly with eitherhydraulic or winch-operable lifting means for the moldboard thereof,comprising a hollow base, spaced vertical hollow frame members extendingfrom said base and communicating with the interior thereof to provide anoil reservoir therewith, a hollow mounting pad fixed on said base andopen to the interior thereof, partition means enclosing a space withinsaid base and mounting pad to define a closed chamber therein, aplurality of conduit means each extending from one of said hollow framemembers to said chamber to provide communication therebetween, an outletopening in said mounting pad in communication with both said chamber andthe interior of the pad and base, a return opening in said mounting padcommunicating with the interior of the chamber only, driving meansextending adjacent the lift frame, hydraulic moldboard lifting meansmountable on the lift frame including a pump mountable on said mountingpad for supplying oil under pressure thereto from the oil reservoiroperable by said driving means and having an intake port overlying saidoutlet opening and an exhaust port overlying said return opening,winch-operable moldboard lifting means mount: able on the lift frameincluding a winch structure having seems a driving pinion operable bysaid driving means and a gear meshing with the driving pinion adjacentsaid mounting pad providing a gear pump to circulate oil for lubricationof the winch structure bearings from the oil reservoir and also havinginlet and return passages extend ing from adjacent the pinionrespectively to said mounting box outlet and return openings, means onthe lift frame for mounting said hydraulic means, and means on the liftframe for mounting said winch-operable hydraulic or Winch means forlifting the bulldozer moldboard, comprising an oil reservoir, partitionmeans in the reservoir defining a closed chamber therein, means placingsaid chamber in communication with a portion of the reservoir remotetherefrom, an outlet aperture in a wall of the reservoir communicatingwith both said chamber and the remainder of the interior of thereservoir, areturn aperture in a wall of the reservoir communicatingwith said chamber only, driving means disposed adjacent the reservoir,hydraulic lifting means and winch' lifting means selectively mountableon the lift frame to raise and lower the moldboard, said hydrauliclifting means including a pump to supply oil under pressure thereto fromthe reservoir for operation thereof upon mounting on the lift frameoperativ'ely connected to said driving means and having intake meanscommunicating with said outlet aperture and also including dischargemeans communicating with said return aperture, and said winch liftingmeans including a winch structure with a driving pinion upon mounting onthe lift frame operatively connected to said driving means and with agear meshing with the driving pinion to pro vide a gear pump forcirculation of oil from the reservoir to the winch structure bearingsfor lubrication thereof and having an inlet passage and a return passageeach extending from adjacent said pinion respectively to said outlet andreturn apertures means on the lift frame for mounting said hydraulicmeans, and means on the frame for mounting said winch means.

4. A bulldozer lift frame adapted to mount either hydraulically operableor winch-operable lifting means for r the bulldozer moldboard eachincluding pump means,

comprising a hollow frame portion forming an oil tank, partition meansdefining a closed chamber in the oil tank, means providing communicationbetween the chamber and a portion of the oil tank remote therefrom,outlet means providing communication from the intelior to the exteriorof the tank, return means providing communication from the exterior ofthe tank to the chamber only, and means on the lift frame forselectively mounting thereon hydraulic lifting means with the pump meansthereof disposed in communication with said outlet to supply oil fromthe tank under pressure for operating the hydraulic means and dischargemeans thereof in communication with said return means and mounting winchlifting means with the pump means thereof disposed in communication withsaid outlet and return means to supply oil from the tank for lubricatingthe winch bear- 1ngs.

5. A bulldozer lift frame adapted to mount either hydraulically operableor winch-operable lifting means for the bulldozer moldboard, comprisinga hollow frame portion forming an oil tank, outlet and return means eachproviding communication between the interior and exterior of the tankfor circulation of oil from the tank and back thereiuto, and means onsaid lift frame for selectively mounting thereon hydraulic lifting meansand winch lifting means each having pump means and intake and exhaustmeans located in correspondence to and upon mounting communicatingrespectively with said outlet and return means for circulating oil fromand to the tank through the respective lifting means to provideoperating hydraulic pressure for the hydraulic means and to providebearing lubrication for the winch means.

6, A bulldozer lift frame adapted to mount either hydraulic orwinch-operated lifting means for the bulldozer moldboard, comprising asubstantially horizontal hollow frame base, hollow frame membersextending upwardly from said base, apertures in said base providingcommunication with said frame members, a hollow top member connectingand placing in communication the upper ends of said frame members, ahollow mounting pad fixed on the upper surface of said base andcommunicating with the interior thereof having a flat horizontalmounting plate, the base, mounting pad, and frame members providing areservoir for oil, partition means eX- tending from the mounting plateto the bottom of the base to define therewith a chamber closed from theremainder of the reservoir, conduits leading from the cham her to eachof the apertures between the base and frame members, an outlet aperturein the mounting plate located with a minor portion of its area withinthe plan projection of the chamber for communication with both thechamber and the remainder of the reservoir, a return aperture in themounting plate located entirely within the plan projection of saidchamber for communication therewith, and bolt-receiving means on saidframe base arranged in a fixed pattern for selectively locating on themounting plate in operative communication with said outlet and returnapertures intake and discharge means of hydraulic lifting means mountedon the lift frame having pump means for supplying oil from saidreservoir under pressure to operate the hydraulic lifting means and pumpmeans of winch-operable lifting means mounted on the lift framecirculating oil from said reservoir to lubricate bearings of the winchlifting means, each of said pump means having a bolting patterncorresponding to that of said bolt-receiving means.

7. A bulldozer lift frame adapted to mount either bydraulic orwinch-operated lifting means for the bulldozer moldboard, comprising ahollow base, spaced vertical hollow frame members extending from saidbase and communicating with the interior thereof to provide an oil tanktherewith, a hollow mounting pad fixed on said base and open to theinterior thereof, partition means defining a closed chamber within thebase and mounting pad, conduit means extending from said chamber to eachof said hollow frame members to provide communication between thechamber and frame members and therethrough with the interior of saidbase, an outlet aperture in said mounting pad communicating with bothsaid chamber and the remainder of the interior of the base, a returnaperture in said pad communicating with said chamber only, and meanscarried by said base for selectively locating on the pad in operativecommunication with said outlet and return apertures respectively, anintake port of pump means supplying oil under pressure from said oiltank to hydraulic lifting means for opera tion thereof and dischargemeans of the hydraulic means and, also respectively, intake anddischarge ports of pump means of winch-operated lifting means tolubricate bearings thereof by circulating oil from said tank.

8. An arrangement for alternatively mounting hydraulic or winchpower-applying means, comprising a hollow mounting support defining anoil tank, oil outlet means for the tank, oil return means for the tank,hydraulic power-applying means and winch powerapplying means selectivelymountable on the support, said hydraulic means including pump means forsupplying oil from the tank thereto under pressure for operation thereofmounting on said support and also including dis charge meanscommunicating with said return means, and said winch means includingpump means for circulating therethrough for lubrication the oil from thetank upon mounting on said support and also including intake anddischarge means communicating respectively with said outlet and returnmeans, means on said sup- 10 port for mounting said hydraulic means, andmeans on the support for mounting said winch means.

9. In a bulldozer lift frame adapted to mount either hydraulicallyoperated or winch-operated lifting means for the bulldozer moldboard, ahollow frame base and hollow side frame members together defining an oilreservoir, a hollow mounting pad on said base open to the interiorthereof, and having a top mounting plate, partition members definingfrom the remainder of the tank a closed chamber in said base, meansproviding communication between said chamber and each of said framemembers, tank outlet means extending through said mounting plate andcommunicating with said remainder of the tank to a major extent and alsowith said chamber to a minor extent, tank return means extending throughthe mounting plate and communicating with said chamber alone, hydrauliclifting means mountable on the lift frame having pump means to supplyoil under pressure for operation thereof, winch lifting means mountableon the lift frame having pump means for circulating oil to lubricateparts thereof, each of said lifting means having intake and exhaustports for communication respectively with said outlet and return meansfor circulation of oil by the pump means from and to the tank throughthe respective lifting means, means on the frame for mounting saidhydraulic means, means on the frame for mounting said winch means, andmeans carried by said frame for selectively locating the hydraulic meansand the winch means on the mounting pad with the ports thereofcommunicating with the outlet and return means upon selective mountingof the hydraulic and winch lift means on the lift frame.

10. In a bulldozer lift frame adapted to mount either hydraulicalyoperated or winch-operated lifting means for the bulldozer moldboard, ahollow frame portion forming an oil tank, outlet and return means eachproviding communication between the interior and exterior of the tankfor circulation of oil therefrom and back thereinto, hydraulic liftingmeans mountable on the lift frame having pump means for supplying oilfrom the tank under pressure for operation of the hydraulic means, winchlifting means mountable on the lift frame having pump means forsupplying oil from the tank to lubricate parts of the winch means, eachof said lifting means having intake and exhaust ports cooperable withsaid outlet and return means respectively for drawing and returning oilfrom and to the tank by the pump means thereof, means on the frame formounting said hydraulic lifting means, means on the frame for mountingsaid winch lifting means, and means carried by said frame forselectively locating the hydraulic means and the winch means with theports thereof communicating with the outlet and return means uponselective mounting of the hydraulic and winch lift means on the liftframe.

11. Apparatus for lifting the moldboard of a bulldozer or the like,comprising a lift frame mountable on the bulldozer including a hollowframe portion defining a reservoir for oil, a closed chamber within thereservoir defined from the remainder thereof, means providingcommunication between said chamber and a portion of the reservoir remotetherefrom, oil outlet means for the reservoir communicating in minordegree with said chamber and in major degree with the remainder of thereservoir, oil return means for the reservoir communicating with saidchamber only, winch-operable moldboard lifting means mountable on saidframe having oil circulating means including pump means for circulatingoil from and back to said reservoir through the winch for lubricationthereof, intake and discharge means for said lifting means communicatingrespectively with the intake and discharge sides of said circulatingmeans and having exterior ports located in correspondence to thelocations of said outlet and return means for respective communicationtherewith upon mounting of the lifting means on the frame, and meanscarried by said frame for mounting '11 the lifting means on said framewith the ports of the intake and discharge means located incommunication with said outlet and return means.

Lancia I an. 6, 1914 Oakes May 25, 1926 12 Anthony et a1. Feb. 23, 1937Austin NOV. 16, 1943 Magee May 8, 1945 Rockwell Mar. 6, 1951 FOREIGNPATENTS Germany Apr. 13, 1937 Great Britain Sept. 13, 1934

